Sleep is a biological process essential for health. Being hospitalized can exacerbate common sleep difficulties in children. Factors that contribute to sleep disturbances during hospitalization include environmental, physiological, and psychological factors. Although sleep interventions exist for healthy children in the community, interventions aimed at hospitalized children need to be developed and piloted with rigorous evaluative methods. The primary purpose of this study is to examine the feasibility and acceptability of the RELAX TO SLEEP program on hospitalized children. Although this study is a pilot study, comparisons will be made to examine sleep outcomes between the intervention group and the control group including: total nocturnal (19h30-07h29), number of nighttime awakenings, longest stretch of nocturnal sleep, and total daytime (07h30-19h29) sleep. Other comparisons include anxiety levels and the development of post-hospital maladaptive behaviours.